How to Connect Speech Foundation Models and Large Language Models? What Matters and What Does Not. - Francesco Verdini; Pierfrancesco Melucci; Stefano Perna; Francesco Cariaggi; Marco Gaido; Sara Papi; Szymon Mazurek; Marek Kasztelnik; Luisa Bentivogli; Sébastien Bratières; Paolo Merialdo; Simone Scardapane (CoRR, 2024)